JSP 登录与注册的小案例之二（无验证码，前端拦截空参）

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">

  <!-- 代码链接: https://pan.baidu.com/s/1qYB7duO 密码: qfiw -->

    <servlet>
        <servlet-name>LoginServlet</servlet-name>
        <servlet-class>com.lf.bookstore_test.servlet.LoginServlet</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>LoginServlet</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>

</web-app>

<?xml version="1.0" encoding="UTF-8"?>

<!-- c3p0-config.xml文件配置 -->

<c3p0-config>
    <named-config name="bookstore_c3p0">
        <!-- 基本配置 -->
        <property name="user">LF</property>
        <property name="password">LF</property>
        <property name="jdbcUrl">jdbc:oracle:thin:@192.168.10.105:1521:orcl</property>
        <property name="driverClass">oracle.jdbc.driver.OracleDriver</property>
        <!-- 配置初始值 -->
        <property name="initialPoolSize">16</property>
        <property name="maxPoolSize">25</property>
        <property name="minPoolSize">10</property>
    </named-config>
</c3p0-config>

package com.lf.bookstore_test.pojo;

public class User {

    private String name;//用户名
    private String password;//密码
    private String e_mail;//邮箱
    //无参构造方法
    public User() {

    }
    //有参构造方法
    public User(String name,String password,String e_mail) {
        this.name = name;
        this.password = password;
        this.e_mail = e_mail;
    }
    // set和get方法
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getE_mail() {
        return e_mail;
    }
    public void setE_mail(String e_mail) {
        this.e_mail = e_mail;
    }
    @Override
    public String toString() {
        return "User [name=" + name + ", password=" + password + ", e_mail="
                + e_mail + "]";
    }
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((e_mail == null) ? 0 : e_mail.hashCode());
        result = prime * result + ((name == null) ? 0 : name.hashCode());
        result = prime * result
                + ((password == null) ? 0 : password.hashCode());
        return result;
    }
    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        User other = (User) obj;
        if (e_mail == null) {
            if (other.e_mail != null)
                return false;
        } else if (!e_mail.equals(other.e_mail))
            return false;
        if (name == null) {
            if (other.name != null)
                return false;
        } else if (!name.equals(other.name))
            return false;
        if (password == null) {
            if (other.password != null)
                return false;
        } else if (!password.equals(other.password))
            return false;
        return true;
    }

}

package com.lf.bookstore_test.dao;

import com.lf.bookstore_test.pojo.User;

public interface UserDao {
    // 注册
    public boolean addUser(User user);
    //登录
    public User queryUser(User user);
    // 验证用户是否已存在
    public boolean queryUserByName(String name);

}

package com.lf.bookstore_test.dao.impl;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.lf.bookstore_test.dao.UserDao;
import com.lf.bookstore_test.pojo.User;
import com.lf.bookstore_test.utils.JdbcUtils;

public class UserDaoImpl implements UserDao{

    /**
     * 添加用户
     */
    @Override
    public boolean addUser(User user) {
        //若为空直接返回false
        if (user==null)
            return false;
        //获取连接
        Connection connection = JdbcUtils.getConnection();
        //创建预编译命令
        PreparedStatement pStatement=null;
        // SQL 语句
        String sql = "INSERT INTO BS_USERINFO VALUES(?,?,?)";
        int seccessCount=-1;
        try {
            pStatement = connection.prepareStatement(sql);
            // 设置相应的参数
            pStatement.setString(1, user.getName());
            pStatement.setString(2, user.getPassword());
            pStatement.setString(3, user.getE_mail());
            //执行SQL语句,返回成功操作的行数
            seccessCount = pStatement.executeUpdate();
            //大于零，则数据库操作成功
            if (seccessCount>0) {
                return true;
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }finally{
            //关闭相应对象
            close(null,pStatement, connection);
        }
        return false;
    }

    @Override
    public User queryUser(User user) {
        //如果name为空直接返回null
        if (user == null)
            return null;

        //创建User
        User resultUser = null;
        //获取连接
        Connection connection = JdbcUtils.getConnection();
        //SQL语句
        String sql = "select username,password,email from bs_userinfo where username = ? ";
        //创建预编译
        PreparedStatement pStatement = null;
        // 创建结果集
        ResultSet rSet = null;
        try {
            pStatement = connection.prepareStatement(sql);
            // 设置参数
            pStatement.setString(1, user.getName());
            // 执行SQL语句
            rSet = pStatement.executeQuery();
            //遍历
            if (rSet.next()) {
                //创建User
                resultUser = new User();
                //赋值
                resultUser.setName(rSet.getString("username"));
                resultUser.setPassword(rSet.getString("password"));
                resultUser.setE_mail(rSet.getString("email"));
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }finally{
            //关闭操作
            close(rSet,pStatement, connection);
        }

        return resultUser;

    }

    /**
     * 根据用户名查询用户是否已存在
     * 返回布尔值
     */
    @Override
    public boolean queryUserByName(String name) {
        // name为空时返回false
        if (name==null) {
            return false;
        }

        //获取连接
        Connection connection = JdbcUtils.getConnection();
        //SQL语句
        String sql = "select username from bs_userinfo where username = ?";
        //创建预编译
        PreparedStatement pStatement = null;
        // 创建结果集
        ResultSet rSet = null;
        System.out.println("connection:"+connection);
        try {
            pStatement = connection.prepareStatement(sql);
            // 设置参数
            pStatement.setString(1, name);
            // 执行SQL语句
            rSet = pStatement.executeQuery();
            //遍历
            if (rSet.next()) {
                return true;
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }finally{
            //关闭操作
            close(rSet,pStatement, connection);
        }
        return false;
    }
    /**
     * 实现增删改操作
     *//*
    public boolean userOperation(String sql,Object...ages) {
        //获取连接
        Connection connection = JdbcUtils.getConnection();
        //创建预编译命令
        PreparedStatement pStatement=null;
        int seccessCount=-1;
        try {
            pStatement = connection.prepareStatement(sql);
            for (int i = 0; i < ages.length; i++) {
                // 设置相应的参数
                pStatement.setObject(i+1, ages[i]);
            }
            //执行SQL语句,返回成功操作的行数
            seccessCount = pStatement.executeUpdate();
            //大于零，则数据库操作成功
            if (seccessCount>0) {
                return true;
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }finally{
            //关闭相应对象
            close(null,pStatement, connection);
        }
        return false;
    }

    //模糊查询
    public List<User> requeryByName(String name) {

        // name为空时，查询全部数据
        name= name==null?"":name;

        //创建List
        List<User> list = new ArrayList<User>();
        //获取连接
        Connection connection = JdbcUtils.getConnection();
        //SQL语句
        String sql = "select username,password,email from bs_userinfo where username like ?";
        //创建预编译
        PreparedStatement pStatement = null;
        // 创建结果集
        ResultSet rSet = null;
        try {
            pStatement = connection.prepareStatement(sql);
            // 设置参数
            pStatement.setString(1, "%"+name+"%");
            // 执行SQL语句
            rSet = pStatement.executeQuery();
            //遍历
            while (rSet.next()) {
                //创建User类
                User user = new User();
                //赋值
                user.setName(rSet.getString("username"));
                user.setPassword(rSet.getString("password"));
                user.setE_mail(rSet.getString("email"));
                //存入List
                list.add(user);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }finally{
            //关闭操作
            close(rSet,pStatement, connection);
        }

        return list;
    }

*/
    // 关闭操作
    private void close(ResultSet rSet,PreparedStatement pStatement,Connection connection){
        //进行相应的关闭（先开后关，后开先关）
        if (rSet!=null) {
            try {
                rSet.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(pStatement!=null){
            try {
                pStatement.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if (connection!=null) {
            try {
                connection.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

}

package com.lf.bookstore_test.service;

import com.lf.bookstore_test.pojo.User;

public interface UserService {
    /**
     * 注册服务
     * @param user
     * @return
     */
    public boolean addUserService(User user);
    /**
     * 登录服务
     * @param user
     * @return
     */
    public User QueryUserService(User user);
    /**
     *  验证用户是否已存在
     * @param name 用户名
     * @return
     */
    public boolean queryUserServiceByName(String name);
}

package com.lf.bookstore_test.service.impl;

import com.lf.bookstore_test.dao.impl.UserDaoImpl;
import com.lf.bookstore_test.pojo.User;
import com.lf.bookstore_test.service.UserService;
/**
 *
 * @author lf
 *
 */
public class UserServiceImpl implements UserService{

    /**
     * 实现注册服务功能
     */
    @Override
    public boolean addUserService(User user) {
        UserDaoImpl uImpl = new UserDaoImpl();
        return uImpl.addUser(user);
    }

    /**
     * 实现查询该用户是否存在功能
     */
    @Override
    public User QueryUserService(User user) {
        UserDaoImpl uImpl = new UserDaoImpl();
        User resultUser = uImpl.queryUser(user);
        return resultUser;
    }

    /**
     * 查询用户是否已被注册
     */
    @Override
    public boolean queryUserServiceByName(String name) {
        UserDaoImpl uImpl = new UserDaoImpl();
        return uImpl.queryUserByName(name);
    }

}

package com.lf.bookstore_test.servlet;

import java.io.IOException;
import java.lang.reflect.Method;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.lf.bookstore_test.pojo.User;
import com.lf.bookstore_test.service.UserService;
import com.lf.bookstore_test.service.impl.UserServiceImpl;
/**
 *
 * @author lf
 *
 */
public class LoginServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        System.out.println("LoginServlet...doGet...");

        /*//获取路径
        String servletName = req.getServletPath();
        //根据路径截取方法名
        String methodName = servletName.substring(1, servletName.length()-3);
        System.out.println("servletName:"+servletName+",methodName:"+methodName);*/
        doPost(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {

        //通过映射的方式调用login或register方法

        System.out.println("...doPost...");
        //获取路径
        String servletName = req.getServletPath();
        //根据路径截取方法名
        String methodName = servletName.substring(1, servletName.length()-3);
        System.out.println("servletName:"+servletName+",methodName:"+methodName);
        Method method = null;
        try {
            method = getClass().getDeclaredMethod(methodName, HttpServletRequest.class,HttpServletResponse.class);
            method.invoke(this, req,resp);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 登录处理方法
     */
    private void login(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        System.out.println("登录处理...");
        // 获取表单的参数值
        String userName = req.getParameter("userName");
        String passWord = req.getParameter("passWord");
        System.out.println("userName:"+userName+",passWord:"+passWord);
        // 创建用户
        User user = new User(userName, passWord, null);
        System.err.println("loginUser:"+user);
        //根据表单的参数值取查询
        UserServiceImpl uService = new UserServiceImpl();
        User rUser = uService.QueryUserService(user);
        System.out.println("返回的结果："+rUser);
        // 查询结果不为空，则进入下一页面，否则回到原来的页面
        if (rUser!=null) {
            // 保存username
            req.getSession().setAttribute("user", rUser.getName());
            resp.sendRedirect(req.getContextPath()+"/index.jsp");;
        }else {
            //提示错误信息
            req.setAttribute("tip", "用户名和密码不匹配");
            req.getRequestDispatcher("/login.jsp").forward(req, resp);
        }

    }

    /**
     * 注册处理
     */
    private void register(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        System.out.println("注册处理...");
        //获取表单的值
        String userName = req.getParameter("userName");
        String passWord = req.getParameter("passWord");
        String email = req.getParameter("email");
        User user = new User(userName, passWord, email);

        System.out.println(user);
        //添加用户，成功进入下一页面，否则回到原来页面
        UserServiceImpl uImpl = new UserServiceImpl();
        boolean isSuccess = uImpl.addUserService(user);
        if (isSuccess) {
            // 存储用户名
            req.setAttribute("user", user.getName());
            req.getRequestDispatcher("/register_success.jsp").forward(req, resp);
        }else {
            req.getRequestDispatcher("/register.jsp").forward(req, resp);
        }

    }

    /**
     * 检查用户名是否存在
     */
    private void nameCheck(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException{
        //设置编码
        req.setCharacterEncoding("utf-8");
        resp.setCharacterEncoding("utf-8");
//        System.out.println("检查用户名是否存在");
        // 获取表单中的参数值
        String userName = req.getParameter("userName");
        System.out.println("_____userName:"+userName);
        //根据表单在的值去查询数据库
        UserServiceImpl uImpl = new UserServiceImpl();
        boolean isExisted = uImpl.queryUserServiceByName(userName);
//        System.out.println("isExisted:"+isExisted);
        // 根据查询结果返回相应的提示
        if (isExisted) {
            resp.getWriter().print("该用户已被注册");
        }
    }
}

package com.lf.bookstore_test.utils;

import java.sql.Connection;
import java.sql.SQLException;

import javax.sql.DataSource;

import com.mchange.v2.c3p0.ComboPooledDataSource;

public class JdbcUtils {

    /**
     * 获取数据库连接
     * @return
     */
    public static Connection getConnection() {
        DataSource ds = new ComboPooledDataSource("bookstore_c3p0");
        Connection connection = null;
        try {
            connection = ds.getConnection();
            return connection;
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;
    }
}

<%@page import="com.lf.bookstore_test.pojo.User"%>
<%@page import="com.lf.bookstore_test.service.impl.UserServiceImpl"%>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <link type="text/css" rel="stylesheet" href="css/style.css" />
    <script >
        /* 文档加载完成后再执行方法   */
        window.onload=function(){
            /* alert(0); */
        };

        function userNameCheck(){
            /* 判断用户名是否已输入 */
            var userName = document.getElementsByName("userName")[0];
            /* 获取标签 */
            var tipNode = document.getElementById("msg");
             if(userName.value==""){
                /* 提示用户名不能为空 */
                tipNode.innerHTML="用户名不能为空哦!";
            }else{
                tipNode.innerHTML="";
            }
        }

        function pwdCheck(){
            /* 判断密码是否已输入 */
            var passWord = document.getElementsByName("passWord")[0];
            /* 获取标签 */
            var tipNode = document.getElementById("pwdMsg");
             if(passWord.value==""){
                /* 提示密码不能为空 */
                tipNode.innerHTML="亲,密码不能为空哦!";
            }else{
                tipNode.innerHTML="";
            }
        }

        function logincheck(){
            /* 判断用户名是否已输入 */
            var userName = document.getElementsByName("userName")[0];
            /* 获取标签 */
            var passWord = document.getElementsByName("passWord")[0];
             if(userName.value==""){
                /* 获取标签 */
                var tipNode = document.getElementById("msg");
                /* 提示用户名不能为空 */
                tipNode.innerHTML="用户名不能为空哦!";
            } else{
                /* 提示密码不能为空 */
                if(passWord.value==""){
                /* 获取标签 */
                var tipNode = document.getElementById("pwdMsg");
                /* 判断密码是否已输入 */
                tipNode.innerHTML="亲,密码不能为空哦!";
                }else{
                    return true;
                }
            }
            return false;
        }
    </script>
</head>
<body>
<div id="header" class="wrap">
    <div id="logo">众软在线图书</div>
    <div id="navbar">
        <form method="get" name="search" action="">
            搜索：<input class="input-text" type="text" name="keywords" /><input class="input-btn" type="submit" name="submit" value="" />
        </form>
    </div>
</div>
<div id="login">
    <h2>用户登陆</h2>
    <form method="post" action="login.do">
        <dl>
            <dt>用户名：</dt>
            <dd><input class="input-text" type="text" name="userName" value="${param.userName }" onblur="userNameCheck()"/><span id="msg">${requestScope.tip }</span></dd>
            <dt>密　码：</dt>
            <dd><input class="input-text" type="password" name="passWord" value="${param.passWord }" onblur="pwdCheck()"/><span id="pwdMsg"></span></dd>
            <dt></dt>
            <dd class="button"><input class="input-btn" type="submit" name="submit" value="" onclick="return logincheck()"/><input class="input-reg" type="button" name="register" value="" onclick="window.location='register.jsp';" /></dd>
        </dl>
    </form>
</div>
<div id="footer" class="wrap">
    众软在线图书 &copy; 版权所有

</div>
</body>
</html>

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <link type="text/css" rel="stylesheet" href="css/style.css" />
    <script>
        /* 下面方法的代码应该重构 */

        // 判断用户名是否为空
        function userNameCheck(){
            /* 判断用户名是否已输入 */
            var userName = document.getElementsByName("userName")[0];
            /* 获取标签 */
            var tipNode = document.getElementById("msg");
             if(userName.value==""){
                /* 提示用户名不能为空 */
                tipNode.innerHTML="用户名不能为空哦!";
            }else{
                tipNode.innerHTML="";
                // 判断用户名是否存在（Ajax局部刷新）

                //获取对象XMLHttpRequest
                var request = new XMLHttpRequest();
                //打开与服务器的连接
                var method = "Get";
                var url = "nameCheck.do?userName="+userName.value;
                request.open(method,url);
                // 发送请求
                request.send(null);
                //为XMLHttpRequest对象添加onreadystatechange事件
                //onreadystatechange事件是服务器状态改变触发的事件
                //如果响应，则输出提示
                request.onreadystatechange=function(){
                    //request.readyState==4请求完成
                    if(request.readyState==4){
                        //200或者304  代表响应正常
                        if(request.status==200 || request.status==304){
                            tipNode.innerHTML=request.responseText;
                        }

                    }
                };
            }
        }

        //密码不能为空判断
        function pwdCheck(){
            /* 判断密码是否已输入 */
            var pwd = document.getElementsByName("passWord")[0];
            /* 获取标签 */
            var tipNode = document.getElementById("pwdMsg");
             if(pwd.value==""){
                /* 提示密码不能为空 */
                tipNode.innerHTML="密码不能为空哦!";
            }else{
                tipNode.innerHTML="";
            }
        }
        //确认密码不能为空判断
        function rePwdCheck(){
            /* 判断确认密码是否已输入 */
            var rePwd = document.getElementsByName("rePassWord")[0];
            /* 获取标签 */
            var tipNode = document.getElementById("rePwdMsg");
             if(rePwd.value==""){
                /* 提示确认密码不能为空 */
                tipNode.innerHTML="确认密码不能为空哦!";
            }else{
                tipNode.innerHTML="";
            }
        }
        //email地址不能为空判断
        function emailCheck(){
            /* 判断email是否已输入 */
            var email = document.getElementsByName("email")[0];
            /* 获取标签 */
            var tipNode = document.getElementById("emailMsg");
             if(email.value==""){
                /* 提示email不能为空 */
                tipNode.innerHTML="email不能为空哦!";
            }else{
                tipNode.innerHTML="";
                //正则表达式判断邮箱
            }
        }

        function registerCheck(){
            /* 判断用户名是否已输入 */
            var userName = document.getElementsByName("userName")[0];
            /* 判断密码是否已输入 */
            var pwd = document.getElementsByName("passWord")[0];
            /* 判断确认密码是否已输入 */
            var rePwd = document.getElementsByName("rePassWord")[0];
            /* 判断email是否已输入 */
            var email = document.getElementsByName("email")[0];
            // 判断密码与确认密码是否匹配
            var isMatched = false;
            // 判断邮箱是否正确
            var isRight = false;
            if(userName.value==""){
                /* 获取标签 */
                var tipNode = document.getElementById("msg");
                /* 提示用户名不能为空 */
                tipNode.innerHTML="用户名不能为空哦!";
            }
           if(pwd.value==""){
                /* 获取标签 */
                var tipNode = document.getElementById("pwdMsg");
                /* 提示密码不能为空 */
                tipNode.innerHTML="密码不能为空哦!";
            }
            if(rePwd.value==""){
                /* 获取标签 */
                var tipNode = document.getElementById("rePwdMsg");
                /* 提示确认密码不能为空 */
                tipNode.innerHTML="确认密码不能为空哦!";
            }else{
                //判断密码与确认密码是否匹配
                if(pwd.value==rePwd.value){
                    isMatched = true;
                }else{
                    /* 获取标签 */
                    var tipNode = document.getElementById("pwdMsg");
                    /* 提示密码不能为空 */
                    tipNode.innerHTML="密码不匹配哦!";
                }
            }
            if(email.value==""){
                /* 获取标签 */
                var tipNode = document.getElementById("emailMsg");
                /* 提示email不能为空 */
                tipNode.innerHTML="email不能为空哦!";
            }else{
                /* 判断邮箱是否匹配 */
                // 使用正则表达式判断邮箱
                var regex =  /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+/;
                isRight = regex.test(email.value);
                if(isRight==false){
                    /* 获取标签 */
                    var tipNode = document.getElementById("emailMsg");
                    /* 提示email不能为空 */
                    tipNode.innerHTML="email不正确哦!";
                }
            }
            //
            if(userName.value!="" && isMatched && isRight){
                return true;
            }

            return false;
        }
    </script>
</head>
<body>
<div id="header" class="wrap">
    <div id="logo">众软在线图书</div>
    <div id="navbar">
        <form method="get" name="search" action="">
            搜索：<input class="input-text" type="text" name="keywords" /><input class="input-btn" type="submit" name="submit" value="" />
        </form>
    </div>
</div>
<div id="register">
    <div class="title">
        <h2>欢迎注册众软在线图书</h2>
    </div>
    <div class="steps">
        <ul class="clearfix">
            <li class="current">1.填写注册信息</li>
            <li class="unpass">2.注册成功</li>
        </ul>
    </div>
    <form method="post" action="register.do">
        <dl>
            <dt>用 户 名：</dt>
            <dd><input class="input-text" type="text" name="userName" value="${param.userName }" onblur="userNameCheck()"/><span id="msg">${requestScope.userMsg }</span></dd>
            <dt>密　　码：</dt>
            <dd><input class="input-text" type="password" name="passWord" value="${param.passWord }" onblur="pwdCheck()"/><span id="pwdMsg">${requestScope.pwdMsg }</span></dd>
            <dt>确认密码：</dt>
            <dd><input class="input-text" type="password" name="rePassWord" value="${param.rePassWord }" onblur="rePwdCheck()"/><span id="rePwdMsg">${requestScope.rePwdMsg }</span></dd>
            <dt>Email地址：</dt>
            <dd><input class="input-text" type="text" name="email" value="${param.email }" onblur="emailCheck()"/><span id="emailMsg">${requestScope.emailMsg }</span></dd>
            <dt></dt>
            <dd class="button"><input class="input-reg" type="submit" name="register" value="" onclick="return registerCheck()"/></dd>
        </dl>
    </form>
</div>
<div id="footer" class="wrap">
    众软在线图书 &copy; 版权所有

</div>
</body>
</html>

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">

    <title>My JSP 'index.jsp' starting page</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->
  </head>

  <body>
    Welcome to my webSite <br>
  </body>
</html>